| Customization: | Available |
|---|---|
| Accuracy: | Tem Equioment |
| Horizontal Line: | Transient Electromagnetic Equipment |
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The Transient Electromagnetic Method (TEM), also known as the Time Domain Electromagnetic Method (TDEM), is a geophysical exploration technique that uses electromagnetic induction to study subsurface structures. This method involves transmitting a pulsed electromagnetic field into the ground via an ungrounded loop or grounded wire source. During the intervals between pulses, a coil or ground electrode measures the secondary eddy current fields generated by subsurface conductive materials.
At its core, TEM operates on the principle of electromagnetic induction. The decay of the secondary field is typically divided into three stages: early, middle, and late. The early-stage field corresponds to high-frequency components, which decay rapidly and have a shallow penetration depth. In contrast, the late-stage field represents low-frequency components, which decay slowly and penetrate deeper into the ground. By analyzing the temporal variations of the secondary field, geologists can infer the electrical properties of subsurface materials at different depths.
Applications of TDEM for Soil Resistivity Resistivity Imaging for Mining TEM for Geological Surveys
The TEM method is widely used in various fields due to its versatility and accuracy. Key applications include:
Groundwater Exploration: Detecting aquifers, fault zones, and water-bearing structures.
Mining and Mineral Exploration: Identifying conductive ore bodies, determining their depth and orientation, and mapping ore accumulation structures.
Coal Mining: Assessing coal seam structures, detecting subsidence, and locating water storage areas within or near mining zones.
Environmental and Engineering Surveys: Investigating old kilns, assessing water content, and conducting environmental impact studies.
Oil and Gas Exploration: Mapping subsurface structures and identifying potential hydrocarbon reservoirs.
Geothermal Energy: Locating geothermal resources and assessing their viability.
The WTEM-2 System is a state-of-the-art transient electromagnetic exploration tool designed for medium to deep geological surveys. It combines high power output, rapid shutdown capabilities, and exceptional anti-interference performance, making it ideal for a wide range of applications, from mineral exploration to groundwater mapping.
High Power Output: The system delivers up to 10kW of power, enabling deep penetration and accurate data collection.
Rapid Shutdown: The transmitter's quick shutdown feature minimizes blind spots in shallow exploration, extending the effective detection range.
Advanced Synchronization: Supports multiple synchronization modes, including cable, GPS, and GPS + quartz clock synchronization, ensuring precise timing even in areas with weak satellite signals.
Wireless Control: A Bluetooth-enabled handheld device allows operators to control the receiver from up to 10 meters away, streamlining field operations.
Robust Design: The system is built to withstand harsh field conditions, with a sealed casing that protects against water and dust.
Multi-Channel Operation: The receiver can be expanded to support up to three measurement channels, increasing survey efficiency.
High Anti-Interference Capability: Advanced filtering techniques and software algorithms ensure reliable performance in noisy environments.
The WTEM-2 System includes the following components:
WTEM-2J Receiver: A high-precision instrument for measuring secondary electromagnetic fields.
WTEM-1D Transmitter: A 10kW high-power transmitter for generating electromagnetic pulses.
WTEM-2T/GPS Synchronization Controller: Ensures precise timing between the transmitter and receiver.
Pocket PC (PDA): A handheld device for controlling the system and displaying real-time data.
PTT-40A Antenna & Adapter: A specialized receiving coil with a large equivalent area and high signal-to-noise ratio, designed for easy deployment in various terrains.
The WTEM-2 System can be configured in different ways depending on the survey requirements:
Central Loop or Coincident Loop Configuration: One transmitter works with one receiver for focused surveys.
Large Loop Configuration: One transmitter can be paired with multiple receivers for extensive area coverage.
The system is highly adaptable, allowing users to tailor their surveys to specific geological conditions. Whether conducting a quick general survey or a detailed 3D mapping project, the WTEM-2 System delivers reliable results.
Versatility: Suitable for a wide range of applications, from mineral exploration to environmental studies.
Ease of Use: The intuitive interface and wireless control make the system accessible to both novice and experienced operators.
High Accuracy: Advanced synchronization and filtering techniques ensure precise measurements.
Durability: Built to withstand tough field conditions, the system is both rugged and reliable.
Cost-Effectiveness: The system's low power consumption and efficient design reduce operational costs.
| Transmitter | |
| Transmitting voltage | ≤200V |
| Transmitting current | ≤50A |
| Current measurement precision | current range before power supply being cut off is 0~50A, display resolution is 0.01A. |
| Power supply frequencies | 0.0625Hz, 0.125Hz, 0.25Hz, 0.5Hz, 1Hz, 2Hz, 4Hz, 8Hz, 16Hz, 32Hz |
| Transmitting waveform | +ON, OFF, -ON, OFF, equal width and dual polarity |
| Turn-off delay time | 1μs~1000μs |
| Turn-off time | ≤1.2μs (pure resistance), changing with the transmitting current and transmitting coil when connecting to the coils |
| Damping resistance | 1000Ω |
| Transmitting coil | 0.1km×0.1km single turn ~ 2km×2km single turn |
| Synchronization mode | external synchronization (cable, GPS) |
| Power supply | internal 12V8.6Ah rechargeable battery (or external 12V power supply) lasting for over 10 hours |
| Dimension | 525×436×217mm 3 |
| Weight | 18.5kg |
| Working temperature | -10°C~+50°C |
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